METHOD FOR MEASURING THE VOLUME AND DETERMINING THE DENSITY OF POROUS MATERIALS Russian patent published in 2023 - IPC G01F17/00 G01N9/26 

FIELD: measuring methods

SUBSTANCE: method for measuring volumes and determining the densities of porous bodies. The volume of the body is calculated by the straight line equation V_T = b+k·ΔP, obtained by constructing a calibration graph, along the abscissa of which the magnitude of the change in air pressure is counted ΔP the sample vessel in the rarefaction or excess pressure mode, and along the y-axis - the volume of the body corresponding to this value of change V_T, the line passes through two points: with coordinates [ΔP; 0], when calibrating an empty vessel, and [ΔP_ref; V_ref] - corresponding to the characteristics of the reference body, where V_T is the desired volume of the body, b and k are the coefficients of the straight line equation, ΔP is the change in air pressure in the sample vessel, ΔP_ref is the amount of change in air pressure in the sample vessel during calibration, V_ref is the volume of the reference body, the density of the porous body is determined by the formula

EFFECT: increase in the accuracy of measuring the volume and determining the density of porous bodies of arbitrary shape, different humidity and fractional composition.

1 cl, 2 dwg